Droughts and fires in southern Europe, California and Siberia.

Floods in Western Europe and China.

Extreme heat in Canada.

These are examples of all the summer's extreme weather events around the world that have surprised scientists in their power.

The timing of the climate panel report could not have been better.

- There are of course natural variations, but we have used doping.

That is why we now clearly see extreme events, says Petteri Taalas, Secretary General, World Meteorological Organization.

Weighs heaviest

The report from the UN Climate Panel is not just "another climate report".

It is the heaviest, a total review of the latest research.

It forms the basis of all climate policy and is crucial for the major climate summit in Glasgow in November.

There, all countries must sharpen their climate goals to meet the promise from Paris in 2015 to keep warming below 2 degrees, and preferably 1.5.

The report is based on 14,000 scientific articles, which are expected to be several thousand pages thick.

It has been written by 234 lead authors, and the drafts have treated tens of thousands of comments.  

For the past two weeks, the report has been discussed by climate scientists and representatives of all countries in the panel before it was accepted on Friday.

The wording of the summary has been weighed on a golden scale.

The report will answer a number of questions:

  • How much warmer has it become and how much warmer can it get based on five scenarios about emissions?

  • How big is the chance of reaching the 2-degree goal?

    1.5?

  • How much have ice and glaciers melted?

    And how will it continue?

  • How much do sea levels rise?

Extreme weather human fault?

Already in the latest report in 2013, the UN Climate Panel stated with 95 percent certainty that it is human emissions that are causing climate change.

But then the conclusions were uncertain about extreme weather such as torrential rain and heat waves, and how human emissions have affected.

But this is an area where the climate panel will now provide long-awaited and better answers.

- The report will provide a lot of news for decision makers.

One thing is a better understanding of how climate change causes extreme weather, says Hoesung Lee, president of the IPCC.